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Coquandite

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Lucky Knock Mine (Lawrence Mine), Whitestone Coulee, Tonasket, Okanogan Co., Washington, USA
© Saul Krotki 2007

Show Coquandite Photos (8)
Formula:
Sb
 
6
[O
 
8
|SO
 
4
] · H
 
2
O
System:TriclinicHardness:3 - 4
This page provides mineralogical data about Coquandite.

Classification of Coquandite

IMA status:Approved 1991
Strunz 8th edition ID:6/B.02-20
Nickel-Strunz 10th (pending) edition ID:7.DE.35

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
E : With only medium-sized cations; unclassified
Dana 8th edition ID:30.1.18.1

30 : ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
1 : (AB)m(XO4)pZq, where m:p>2:1
Hey's CIM Ref.:25.8.2

25 : Sulphates
8 : Sulphates of Sb, V, Cr and U
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Type Occurrence of Coquandite

Co-type Localities:Pereta Mine, Pereta, Scansano, Grosseto Province, Tuscany, Italy
Lucky Knock Mine (Lawrence Mine), Whitestone Coulee, Tonasket, Okanogan Co., Washington, USA
Year of Discovery:1992

Physical Properties of Coquandite

Hardness (Mohs):3 - 4

Crystallography of Coquandite

Crystal System:Triclinic
Cell Parameters:a = 11.43Å, b = 29.77Å, c = 11.31Å
α = 91.07°, β = 119.24°, γ = 92.82°
Ratio:a:b:c = 0.384 : 1 : 0.38
Unit Cell Volume:V 3,350.00 ų (Calculated from Unit Cell)

Optical Data of Coquandite

Type:Biaxial (+)
Dispersion:r < v strong

Chemical Properties of Coquandite

Formula:
Sb
 
6
[O
 
8
|SO
 
4
] · H
 
2
O
Essential elements:H, O, S, Sb
All elements listed in formula:H, O, S, Sb

Relationship of Coquandite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
7.DE.05Mangazeite
Al
 
2
[(OH)
 
4
|SO
 
4
] · 3H
 
2
O
7.DE.10Carbonatecyanotrichite
Cu
 
4
Al
 
2
[(OH)
 
12
|(CO
 
3
,SO
 
4
)] · 2H
 
2
O
7.DE.10Cyanotrichite
Cu
 
4
Al
 
2
[(OH)
 
12
|SO
 
4
] · 2H
 
2
O
7.DE.15Schwertmannite
Fe
3+
16
O
 
16
(OH,SO
 
4
)
 
12-13
 · 10-12H
 
2
O
7.DE.20Tlalocite
Cu
 
10
Zn
 
6
(TeO
 
3
)(TeO
 
4
)
 
2
Cl(OH)
 
25
·27H
 
2
O
7.DE.25Utahite
Cu
 
5
Zn
 
3
[(OH)
 
2
|TeO
 
4
]
 
4
 · 7H
 
2
O
7.DE.40Osakaite
Zn
 
4
(SO
 
4
)(OH)
 
6
 ·5H
 
2
O
7.DE.45Wilcoxite
MgAl[F|(SO
 
4
)
 
2
] · 18H
 
2
O
7.DE.50Stanleyite
(V
4+
 
O)[SO
 
4
] · 6H
 
2
O
7.DE.55Mcalpineite
Cu
 
3
[TeO
 
6
] · H
 
2
O
7.DE.60Hydrobasaluminite
Al
 
4
[(OH)
 
10
|SO
 
4
] · 12-36H
 
2
O
7.DE.65Zaherite
Al
 
12
[(OH)
 
26
|(SO
 
4
)
 
5
] · 20H
 
2
O
7.DE.70Lautenthalite
PbCu
 
4
(SO
 
4
)
 
2
(OH)
 
6
·3H
 
2
O
7.DE.75Camerolaite
Cu
 
4
Al
 
2
[(OH)
 
10
|CO
 
3
|(HSbO
 
4
,SO
 
4
)] · 2H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
25.8.1Klebelsbergite
Sb
 
4
[O
 
4
|(OH)
 
2
|SO
 
4
]
25.8.3Peretaite
Ca(SbO)
 
4
[(OH)|SO
 
4
]
 
2
 · 2H
 
2
O
25.8.4Cannonite
Bi
 
2
[O|(OH)
 
2
|SO
 
4
]
25.8.5Minasragrite
(V
4+
 
O)[SO
 
4
] · 5H
 
2
O
25.8.6Stanleyite
(V
4+
 
O)[SO
 
4
] · 6H
 
2
O
25.8.7Redingtonite
(Fe
2+
 
,Mg,Ni)(Cr,Al)
 
2
(SO
 
4
)
 
4
·22H
 
2
O
25.8.8Meta-uranopilite
(UO
 
2
)
 
6
[(OH)
 
10
|SO
 
4
] · 5H
 
2
O
25.8.9Uranopilite
(UO
 
2
)
 
6
[(OH)
 
10
|SO
 
4
] · 12H
 
2
O
25.8.10Natrozippeite
Na
 
4
(UO
 
2
)
 
6
[(OH)
 
10
|(SO
 
4
)
 
3
] · 4H
 
2
O
25.8.11Zippeite
K
 
4
(UO
 
2
)
 
6
[(OH)
 
10
|(SO
 
4
)
 
3
] · 4H
 
2
O
25.8.12Johannite
Cu(UO
 
2
)
 
2
[OH|SO
 
4
]
 
2
 · 8H
 
2
O
25.8.13Magnesiozippeite
Mg(UO
 
2
)
 
2
(SO
 
4
)(OH)
 
4
·1.5H
 
2
O
25.8.14Zinczippeite
Zn
 
2
(UO
 
2
)
 
6
(SO
 
4
)
 
3
(OH)
 
10
·16H
 
2
O

Other Names for Coquandite

Synonyms:
IMA1991-024
Other Languages:
German:Coquandit
Spanish:Coquandita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Coquandite

Reference List:New Minerals (1997), New Minerals 1990-1994.

Mineralogical Magazine: 56: 599-603.

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    Localities for Coquandite

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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Italy
     
    • Tuscany
      • Grosseto Province
        • Scansano
          • Pereta
    		Min.Mag.:56:599-603.
      • Pisa Province
        • Pomarance
    		Orlandi, P. (1997): Zibaldone di mineralogia italiana. Rivista Mineralogica Italiana, 21, 179-185.
      • Siena Province
        • Chiusdino
    		Lapis Magazine Vol 6.1993 Page 22
    Portugal
     
    • Porto District
      • Gondomar
    USA
     
    • Washington
      • Okanogan Co.
        • Tonasket
          • Whitestone Coulee
    		Min.Mag.: 56:599-603.
    Mineral and/or Locality
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